[hocus pocus]

I'm sorry to hear you're going through this. I think you'd benefit from looking at information about emancipation. I don't know too much about the process or if it differs depending on where you're living, but maybe your friend's family can help you look into this? If you're emancipated you will be able to live with your friend's family without your parent's permission.

I know you said your parents are not in favor of allowing you to stay with your friend's family and I am not sure how you asked them but it might be worth asking them again. Maybe you can write a list of advantages and disadvantages and compose a persuasive speech to help convince them of what is best for you and your health. You could tell your parents that you'll keep in contact with them as that might have a small chance of easing their worries.

My advice in regards to what you're going through is a little limited so I don't have much else to say but I truly hope you're able to work things out. I will keep you in my thoughts.